From 4dedbf8dc1c825f2e4aa2d2624058533b5d76f85 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 25 Jul 2011 17:12:20 -0700 Subject: [PATCH] sparc64: kill page table quicklists With the recent mmu_gather changes that included generic RCU freeing of page-tables, it is now quite straightforward to implement gup_fast() on sparc64. This patch: Remove the page table quicklists. They are pointless and make it harder to use RCU page table freeing and share code with other architectures. BTW, this is the second time this has happened, see commit 3c936465249f ("[SPARC64]: Kill pgtable quicklists and use SLAB.") Signed-off-by: David S. Miller Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/sparc/Kconfig | 4 ---- arch/sparc/include/asm/pgalloc_64.h | 32 +++++++++++++++----------------- arch/sparc/mm/tsb.c | 11 +++++++++++ 3 files changed, 26 insertions(+), 21 deletions(-) diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 253986b..af64348 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -81,10 +81,6 @@ config IOMMU_HELPER bool default y if SPARC64 -config QUICKLIST - bool - default y if SPARC64 - config STACKTRACE_SUPPORT bool default y if SPARC64 diff --git a/arch/sparc/include/asm/pgalloc_64.h b/arch/sparc/include/asm/pgalloc_64.h index 4e5e087..cb4867d 100644 --- a/arch/sparc/include/asm/pgalloc_64.h +++ b/arch/sparc/include/asm/pgalloc_64.h @@ -5,7 +5,6 @@ #include #include #include -#include #include #include @@ -14,69 +13,68 @@ /* Page table allocation/freeing. */ +extern struct kmem_cache *pgtable_cache; + static inline pgd_t *pgd_alloc(struct mm_struct *mm) { - return quicklist_alloc(0, GFP_KERNEL, NULL); + return kmem_cache_alloc(pgtable_cache, GFP_KERNEL); } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { - quicklist_free(0, NULL, pgd); + kmem_cache_free(pgtable_cache, pgd); } #define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { - return quicklist_alloc(0, GFP_KERNEL, NULL); + return kmem_cache_alloc(pgtable_cache, + GFP_KERNEL|__GFP_REPEAT); } static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) { - quicklist_free(0, NULL, pmd); + kmem_cache_free(pgtable_cache, pmd); } static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { - return quicklist_alloc(0, GFP_KERNEL, NULL); + return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); } static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) { struct page *page; - void *pg; + pte_t *pte; - pg = quicklist_alloc(0, GFP_KERNEL, NULL); - if (!pg) + pte = pte_alloc_one_kernel(mm, address); + if (!pte) return NULL; - page = virt_to_page(pg); + page = virt_to_page(pte); pgtable_page_ctor(page); return page; } static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { - quicklist_free(0, NULL, pte); + free_page((unsigned long)pte); } static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) { pgtable_page_dtor(ptepage); - quicklist_free_page(0, NULL, ptepage); + __free_page(ptepage); } - #define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE) #define pmd_populate(MM,PMD,PTE_PAGE) \ pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE)) #define pmd_pgtable(pmd) pmd_page(pmd) -static inline void check_pgt_cache(void) -{ - quicklist_trim(0, NULL, 25, 16); -} +#define check_pgt_cache() do { } while (0) #define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) #define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c index a5f51b2..536412d 100644 --- a/arch/sparc/mm/tsb.c +++ b/arch/sparc/mm/tsb.c @@ -236,6 +236,8 @@ static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_idx, unsign } } +struct kmem_cache *pgtable_cache __read_mostly; + static struct kmem_cache *tsb_caches[8] __read_mostly; static const char *tsb_cache_names[8] = { @@ -253,6 +255,15 @@ void __init pgtable_cache_init(void) { unsigned long i; + pgtable_cache = kmem_cache_create("pgtable_cache", + PAGE_SIZE, PAGE_SIZE, + 0, + _clear_page); + if (!pgtable_cache) { + prom_printf("pgtable_cache_init(): Could not create!\n"); + prom_halt(); + } + for (i = 0; i < 8; i++) { unsigned long size = 8192 << i; const char *name = tsb_cache_names[i]; -- 2.7.4